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    SubjectRe: [PATCH v4 08/16] locking/rwsem: Make rwsem_spin_on_owner() return owner state
    On Sat, Apr 13, 2019 at 01:22:51PM -0400, Waiman Long wrote:
    > In the special case that there is no active lock and the handoff bit
    > is set, optimistic spinning has to be stopped.

    This makes me think this should've been _before_ you added the handoff
    bit. So that when you introduce the handoff, everything is solid.

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